Ulwelwe emachibini okubhukuda lubangelwa ukunganele kokubulala amagciwane namanzi angcolile.Lawa ma-algae angase ahlanganise ulwelwe oluluhlaza, ama-cyanobacteria, ama-diatom, njll., okuzokwenza ifilimu eluhlaza phezu kwamanzi noma amachashazi ezinhlangothini nasezinqeni zamachibi okubhukuda, okungathinti nje kuphela ukubonakala kwechibi, kodwa...
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